Improper input validation in Cisco Adaptive Security Appliance
CVE-2021-34790
Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. For more information about these vulnerabilities, see the Details section of this advisory. Note: These vulnerabilities have been publicly discussed as NAT Slipstreaming.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.011 (65.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 65.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
- Cisco Adaptive Security Appliance
- Cisco Adaptive Security Appliance Software
- Cisco Asa 5505
- Cisco Asa 5505 Firmware — versions 009.008, 009.015
- Cisco Asa 5512-X
- Cisco Asa 5512-X Firmware — versions 009.008, 009.015
- Cisco Asa 5515-X
- Cisco Asa 5515-X Firmware — versions 009.008, 009.015
- Cisco Asa 5525-X
- Cisco Asa 5525-X Firmware — versions 009.008, 009.015
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-b… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34790?
- CVE-2021-34790 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, classified under CWE-358. CVSS score: 4.7/10. Published 2021-10-27.
- How severe is CVE-2021-34790?
- Medium severity. CVSS v3 base score is 4.7 out of 10.